700 EQUISETACEZ, 
6225).—Southward to Cuil, and widely spread in Europe, Asia, and Arrica, including 
the Azores and CANARIES. 
This widely diffused species presents a great variety of forms, in all parts of its area, 
only two of which, however, are peculiar to our region. These are miilleri and annu- 
liferum (Milde, loc. cit. pp. 438 et 444), from Chinantla and the Sierra de la Cruz 
respectively. 
6. Equisetum robustum, A. Brown in Sillim. Am. Journ. Sc. xlvi. 1844, p. 88; 
Milde in Nov. Act. Nat. Cur. xxiv. 2, p. 533, t. 31, et Fil. Europ. p. 241; Fourn. Mex. 
Pl. Enum. i. p. 142; Eaton in Proc. Am. Acad. xviii. p. 189. 
CanaDA and British CoLuMBIA southward to CaLiIForNiIA and Trxas.—Norte Mexico, 
swamps near Morales (Schaffner, 964); Sourh Muxico, Orizaba (Weber), scattered in 
the valley of Mexico (Schaffner).—Also in Inpia. 
7. Equisetum schaffneri, Milde in Verhandl. zool.-bot. Gesell. Wien, 1861, 
p. 8345; Nov. Act. Nat. Cur. xxiv. 2, p. 421, t. 23, et Fil. Europ. &c. p. 233; Fourn. 
Mex. Pl. Enum. i. p. 142.—NortuH Mexico, San Luis Potosi (Virlet d’Aoust) ; Sours 
Mexico, Orizaba (Schaffner).—Prrvu ; CHIL. 
Order CLXIII. LYCOPODIACE. 
As here limited, this Order includes only two other genera besides those represented 
in Mexico, namely, Phylloglossum, a very remarkable monotype, resembling a miniature 
Plantago, and inhabiting Australia and New Zealand; and 7 mesipteris, also a very 
singular monotype, which is spread over Australia, New Zealand, and Polynesia, and 
has been recorded as having been collected in California by Douglas; but it is just 
possible that the specimens in the Kew Herbarium purporting to come from California 
were so labelled by mistake, for there is no other evidence of its existence in that 
country. ‘The Order is almost ubiquitous, except in the very driest regions; yet it 
seems to be wholly wanting in the island of Juan Fernandez, where there is a rich 
fern-vegetation ; and none has hitherto been collected in the Bermudas, where there 
are about twenty-five species of ferns, except the littoral Psilotum triguetrum. On 
the other hand two species of Lycopodium occur in the very sparse flora of Ascension. 
1. LYCOPODIUM. 
Lycopodium, Linn. pro parte; Spring, Monogr. Fam. Lycop. 1. et ii. pp. 5—52. 
This genus is generally spread where there is sufficient humidity; and several of the 
species have an exceedingly wide range. It is noteworthy, however, that no species is 
known to occur in California, and the genus is only very sparingly represented eastward 
through Arizona, New Mexico, and Texas. Spring retains 107 species, which Mr. J. G. 
Baker, in a synopsis of the genus he has prepared for publication, reduces to eighty. 
